$269 installed isn't bad, depending on what it is.
I do a lot of remote starts through my business - selling Clifford and Avital - both DEI products. I also use Idatalink interface modules.
To price these separately, it would be $100 for an Avital basic keyless entry/remote start, with 1000' range. $75 for interface module (that's required on almost ALL vehicles these days), and $125 for labor.
Think of it this way - if you don't know what youre doing, then spend the $125 for a quality install that's guaranteed to work, and you never have to mess with it.
I'm not trying to make a sale here, most likely none of you live close to me, but I see too much of people trying to save money and they have no clue what's involved in the install. Not that you can really mess anything up, but there are techniques (as with anything) that make an install cleaner, easier, or just overall better.
When you're shopping for a remote start, make sure the store has a reputable installer. That's 75% of the process, most places can carry the lines, but it's some that can't do the install and no matter what you buy, it's no good without being installed right.